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Title: THAW WEAKENING OF PAVEMENT STRUCTURES IN SEASONAL FROST AREAS
Accession Number: 00607740
Record Type: Component
Availability: Find a library where document is available Abstract: Pavement structures in the northern United States, Canada, Scandinavia, and other seasonal frost areas of the world are subject to freezing in winter and thawing in spring. Most damage to pavements in seasonal frost areas occurs during the spring thaw and, to a lesser extent, during partial thaw periods in winter. To minimize damage, pavement engineers must be able to determine the structural capacity of road and airfield pavements during thawing periods. Four pavement test sections were built in the Frost Effects Research Facility at the U.S. Army Cold Regions Research and Engineering Laboratory in Hanover, New Hampshire, to study the performance of various pavement structures subjected to freeze-thaw cycling. The test sections consisted of asphalt concrete pavement over a clay subgrade, asphalt concrete over crushed gravel on a clay subgrade, asphalt concrete over 178 mm of crushed gravel and 203 mm of clean sand on a clay subgrade, and asphalt concrete over 254 mm of crushed gravel and 127 mm of clean sand on a clay subgrade. Thermocouples were embedded throughout the pavement structure and subgrade, and the pavement structure was subjected to several freeze-thaw cycles. Deflection measurements taken during the thawing periods at four locations in each test section used a Dynatest falling-weight deflectometer (FWD) to validate existing back-calculation procedures for pavements subject to seasonal frost. Soon it became apparent that the back-calculation procedures had difficulties. Another study was initiated to determine if additional information pertaining to freeze-thaw cycling could be obtained from the FWD measurements. The results of the second study are presented.
Supplemental Notes: This paper appears in Transportation Research Record No. 1286, Design and Evaluation of Rigid and Flexible Pavements 1990. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
Monograph Title: Monograph Accession #: 01411074
Authors: Janoo, Vincent CBerg, Richard LPagination: p. 217-233
Publication Date: 1990
Serial: ISBN: 0309050707
Features: Figures
(25)
; References
(16)
; Tables
(1)
TRT Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Data and Information Technology; Design; Geotechnology; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces; I42: Soil Mechanics
Files: TRIS, TRB
Created Date: Apr 30 1991 12:00AM
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